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Radiation damage and nuclear heating studies in selected functional materials during the JET DT campaign
Jozef Stefan Inst, Reactor Phys Dept, Jamova 39, SI-1000 Ljubljana, Slovenia.;Culham Sci Ctr, JET, EUROfus Consortium, Abingdon OX14 3DB, Oxon, England..
Jozef Stefan Inst, Reactor Phys Dept, Jamova 39, SI-1000 Ljubljana, Slovenia.;Culham Sci Ctr, JET, EUROfus Consortium, Abingdon OX14 3DB, Oxon, England..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Culham Sci Ctr, JET, EUROfus Consortium, Abingdon OX14 3DB, Oxon, England..
ENEA, Via E Fermi 45, I-00044 Rome, Italy.;Culham Sci Ctr, JET, EUROfus Consortium, Abingdon OX14 3DB, Oxon, England..
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2016 (English)In: Fusion engineering and design, ISSN 0920-3796, E-ISSN 1873-7196, Vol. 109, 1011-1015 p.Article in journal, Meeting abstract (Refereed) Published
Abstract [en]

A new Deuterium-Tritium campaign (DTE2) is planned at JET in the next years, with a proposed 14 MeV neutron budget of 1.7 x 10(21), which is nearly an order of magnitude higher than any previous DT campaigns. The neutron and gamma ray fields inside the JET device during DT plasma operations at specific locations have previously been evaluated. It is estimated that a total neutron fluence on the first wall of JET of up to 10(20) n/m(2) could be achieved, which is comparable to the fluence occurring in ITER at the end of life in the rear part of the port plug, where several diagnostic components will be located. The purpose of the present work is to evaluate the radiation damage and nuclear heating in selected functional materials to be irradiated at JET during DT plasma operation. These quantities are calculated with the use of the MCNP6 code and the FISPACT II code. In particular the neutron and gamma ray fields at specific locations inside the JET device, dedicated to material damage studies, were characterized. The emphasis is on a potential longterm irradiation station located close to the first wall at outboard midplane, offering the opportunity to irradiate samples of functional materials used in ITER diagnostics, to assess the degradation of the physical properties. The radiation damage and the nuclear heating were calculated for selected materials irradiated in these positions and for the neutron flux and fluence expected in DTE2. The studied candidate functional materials include, among others, Sapphire, YAG, ZnS, Spinel, Diamond. In addition the activation of the internal irradiation holder itself was calculated with FISPACT. Damage levels in the range of 10(-5) dpa were found. 2016 EURATOM.

Place, publisher, year, edition, pages
2016. Vol. 109, 1011-1015 p.
Keyword [en]
JET, Material damage, Nuclear heating, Activation, DT operations, MCNP
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-305295DOI: 10.1016/j.fusengdes.2016.01.033ISI: 000382421900175OAI: oai:DiVA.org:uu-305295DiVA: diva2:1038332
Conference
12th International Symposium on Fusion Nuclear Technology (ISFNT), SEP 14-18, 2015, Jeju, SOUTH KOREA
Available from: 2016-10-18 Created: 2016-10-14 Last updated: 2016-10-18Bibliographically approved

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